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PlainSpell

co

/koʊ/noun, pronoun

co is spelled C-O: 2 letters and one syllable. It appears 162 times per million words in written English, the 625th most frequent word form (wordfreq, 2021 data). As a noun, co means “Clipping of company” (English Wiktionary, September 2026). The plural of co is cos or cos..

How many letters and syllables are in co?

Letters2: C-O
Syllables1 (from its American pronunciation)
In writing162 times per million words; the 625th most frequent word form
Wrong spellings searchednone measured in search
Rhymes with

Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); rhymes and same-letter words are computed by PlainSpell from its own word list.

How common is co?

Co appears 162 times per million words in written English, the 625th most frequent word form in the list.

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

How do you pronounce co?

  • UK /kəʊ/
  • US /koʊ/

Co has one syllable (counted from its American pronunciation in the CMU Pronouncing Dictionary).

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-co.wav, LL-Q1860_(eng)-Flame,_not_lame-co-.wav, Wikimedia Commons (author and licence on each file's page).

What rhymes with co?

The 12 most written words on PlainSpell end in the same sounds as co from its last stressed vowel (/oʊ/):

Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).

Forms of co

  • cos plural
  • co.
  • coself
  • cos. plural

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What does co mean?

The meanings the English Wiktionary records, quoted as written there (source below).

noun

  1. 1

    colloquialClipping of company.

pronoun

  1. 1

    nonstandardGender-neutral subject pronoun, coordinate with gendered pronouns he and she.

  2. 2

    nonstandardGender-neutral object pronoun, coordinate with gendered pronouns him and her.

noun

as CO
  1. 1

    Abbreviation of county.

  2. 2

    Initialism of commanding officer.

  3. 3

    Initialism of commissioned officer.

  4. 4

    USInitialism of corrections officer or initialism of correctional officer.

  5. 5

    Initialism of conscientious objector.

  6. 6

    Initialism of clothing optional.

  7. 7

    Initialism of common-offset method.

  8. 8

    Abbreviation of cutoff.

verb

as CO
  1. 1

    Abbreviation of cast on.

noun

as Co
  1. 1

    Abbreviation of company, alternative form of Co..

  2. 2

    Abbreviation of county, alternative form of Co..

  3. 3

    Abbreviation of cotton.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

Co in Spanish, French, German and Portuguese

LanguageWords
Portuguesecia. (abbreviation of company), co- (together, mutually, jointly), Cia., Ca. (company), & Cia (abbreviation of "and company")
Frenchco- (together, mutually, jointly), cie (company), et cie (abbreviation of "and company")
Germanko-, mit- (together, mutually, jointly)
Spanishco- (together, mutually, jointly)

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.

Where does co come from?

Clipping of company.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What to look up after co